| City: | Ada, Oklahoma |
| County: | Pontotoc County |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 9:25:24 AM |
| Population: | No Population Data |
| Area Code: | 580 |
| Classification: | PO Box |
| Coordinates: | 34.7744, -96.6781 |
| Quick Link: |
ZIP code 74821 serves as Ada's designated PO Box ZIP, handling mail for businesses and residents who prefer PO Box delivery. While Ada's primary ZIP (74820) provides street delivery throughout the city, 74821 focuses exclusively on PO Box services with 503 boxes serving the community.
The Ada post office at this location also handles business mail for 316 commercial delivery points. With 25 business establishments employing 268 workers in this ZIP's service area, the facility plays a role in the local business community beyond residential mail.
This ZIP includes limited carrier delivery to E 12th St, which appears to be a single commercial location with multiple business units. However, the primary function remains PO Box service for Ada residents and businesses who choose this delivery method over street addresses.
To mail to a PO Box in Ada, use:
PO Box [number]
Ada, OK 74821For street addresses in Ada, use the main ZIP code 74820.
Single street delivery location suggests a commercial building or business center.
ZIP Code 74821 supports both business and residential activity. According to the Business Census (2024), there are 24 business establishments, employing about 268 people with an annual payroll of $12,848,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 2,027Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 24Source: CBP |
| 1st Quarter Payroll: | $3,283,000Source: CBP |
| Annual Payroll: | $12,848,000Source: CBP |
| # of Employees: | 268Source: CBP |
ZIP Code 74821 is located in Pontotoc County, Oklahoma, within the Ada, OK Metropolitan Statistical Area (CBSA 10220) and Oklahoma's 4th Congressional District. This Micro area has a population of 37,492 people, about 0.00% of whom live in ZIP Code 74821. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Ada, OKSource: Census |
| CBSA Number: | 10220Source: Census |
| CBSA Type: | MicroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 37,492Source: Census |
| MSA: | Source: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 04Source: USPS |
| Congressional Land Area: | 9777.28 sq miSource: Census |
| PMSA: | Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 4000200Source: Census |
| Place Name: | Ada city; OklahomaSource: Census |
We could not locate which school district 74821 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.